Sökning: "Group 14 Elements"
Visar resultat 1 - 5 av 24 avhandlingar innehållade orden Group 14 Elements.
1. Organic Heavy Group 14 Element Compounds : A Study of Their Chemical Bonding Properties Directed Towards Applications as Molecular Wires and in Synthesis
Sammanfattning : The research described herein includes synthesis, spectroscopy, and quantum chemical calculations with focus on the characteristic properties of compounds with bonds between carbon and the heavier Group 14 elements.The chapters based on the first four papers concern σ- and σ/π-conjugated compounds, although the focus of the first paper is on ring strain of bicyclo[1. LÄS MER
Sammanfattning : Nowadays π-conjugated molecules are widely used as materials for devices in organic and molecular electronics. This is due to the ability of such molecules to conduct electricity. However, π-conjugation leads to molecular rigidness and associated lower solubility, which limits possible applications. LÄS MER
3. Conjugation in Organic Group 14 Element Compounds : Design, Synthesis and Experimental Evaluation
Sammanfattning : This thesis focuses on the chemical concept of conjugation, i.e., electron delocalization, and the effect it has on electronic and optical properties of molecules. LÄS MER
Sammanfattning : The aim of this thesis is to contribute to knowledge about how the work and profession of upper secondary school teachers is understood and shaped by the teachers in the beginning of the 21st century, and to relate that understanding of work and professional development to the strivings of the teachers’ trade unions and the state. With the implementation of an innovation as a starting point, the teachers’ narratives also described their work in a broader sense. LÄS MER
5. Heavy-Core Staffanes : A Computational Study of Their Fundamental Properties of Interest for Molecular Electronics
Sammanfattning : The basic building blocks in molecular electronics often correspond to conjugated molecules. A compound class consisting of rigid rod-like staffane molecules with the heavier Group 14 elements Si, Ge, Sn and Pb at their bridgehead positions has now been investigated. LÄS MER